Dom.bash

Nombre: Dom.bash.
Autor: Nixcraft.
Descripción: Script que permite obtener información del Centro de Datos, propietario de la IP, Ciudad y País de un Dominio
Visto en nixCraft

#!/bin/bash
# A sample shell script to print domain ip address hosting information such as
# Location of server, city, ip address owner, country and network range.
# This is useful to track spammers or research purpose.
# -------------------------------------------------------------------------
# Copyright (c) 2006 nixCraft project [http://cyberciti.biz/fb/]
# This script is licensed under GNU GPL version 2.0 or above
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
# -------------------------------------------------------------------------
# Last updated on Mar/05/2010
# -------------------------------------------------------------------------
 
# Get all domains
_dom=$@
 
# Die if no domains are given
[ $# -eq 0 ] && { echo "Usage: $0 domain1.com domain2.com ..."; exit 1; }
for d in $_dom
do
 _ip=$(host $d | grep 'has add' | head -1 | awk '{ print $4}')
 [ "$_ip" == "" ] && { echo "Error: $d is not valid domain or dns error."; continue; }
 echo "Getting information for domain: $d [ $_ip ]..."
 whois "$_ip" | egrep -w 'OrgName:|City:|Country:|OriginAS:|NetRange:'
 echo ""
done

Establecemos permisos de ejecución 

chmod +x dom.bash

Ejecutamos el script pasando como parámetro un dominio o varios

./dom.bash cyberciti.biz google.com